buildx-pull.yml

name: buildx-pull

on:
  pull_request:
    branches:
      - main
  push:
    branches:
      - main

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Buildx pull
        id: cache
        uses: ./buildx-pull/
        with:
          images: |
            registry.hub.docker.com/library/alpine:3.15
            registry.hub.docker.com/library/alpine:3.16
      - name: Check registry-addr
        run: test "${{ steps.cache.outputs.registry-addr }}" = "localhost:5000"
      - name: Check buildx-opts
        env:
          BUILDX_OPTS: ${{ steps.cache.outputs.buildx-opts }}
        run: |
          n=0
          for opt in ${BUILDX_OPTS}; do
            echo "image: ${opt}"
            if ! [[ ${opt} == --cache-from=localhost:5000/cache-* ]]; then
              echo "Wrong format" >&2
              exit 1
            fi
            image=$(echo "${opt}" | sed 's/^--cache-from=//')
            docker pull ${image}
            n=$((n + 1))
          done
          test ${n} -eq 2